Improvement in attaching knobs to spindles



UNITED STATES PATENT OFFICE.

HENRY A; DIEEKEs, or NEW YORLN. Y.

IMPRovEMENTVlN ATTAci-nNG K NoBs ro SPINDLES.

Specification forming part of Letters Patent N o. 174,209, dated February 29, 1876; application led August 19, 1875.

-To all whom it may concern:

Be it known that I, HENRYA. Dummies, of

, the city, county, and State ot' New York, have invented certain Improvements in Door- Knobs and Spindles, of which the following of aspindle, p'rovided with a head at one end and an actuating-knob at the other end, with an inert knob, provided with a recess or cavity in its end to receive the headon spindle of the other knob, all ot' which will be more fully hereinafter described, and pointed out in the claim.

The inert outer knob may be arranged to revolve when grasped by the hand, or it may be secured rigidly to the door, as desired 5 but in either case it does notactuate the'spindle.

' In the drawings, Figure 1 is an-elevation of one form ofmy device, partly broken away to show the interior construction. Fig. 2 is a sectional view of another form ot thesame,

slightly different in construction. In both of' ,these forms the inert 'knob is arranged so that Let A represent a door; B, an ordinary night-latch, and C the inner or actuating knob. This latter knob may be affixed rigidly, in the usual manner, to a spindle, D. This spindle is provided on its outer end with a head, a, and that portion oi' the spindle next the head, as 'at b, is preferably made cylindrical the remainder should be polygonal, as usual. In the construction shown in Fig. 1, the head a of the spindle rests in a recess-or cavity formed in the outer or inert knob E,

or its neck c. After the head a is placed in the recess, a washer, c, preferably constructed `or in any equivalent manner.

to snugly encircle the` neck b of the spindle, isslipped over the same and up to the base of the neck c, to which it is secured by screws, The spindle is now pushed through the door and latch from the outside and the inner knobG attached. The base of the neck c and thewasher c now rest in asuitable recess in the ordinary roseplate g, and no screws are visible from the outside of the door. The construction shown in Fig. 2 is very similar, except that the neck cis made separate from the knob and serves the same purpose as the washer e, the neck b ofthe spindle being elongated and finding a bearing inthe neck of' the knob, as clearly shown. This arrangement gives a longer bearing for the spindle, and is adapted to such knobs as are constructed in parts and brazed together, and to porcelain knobs. The construction shown in Fig. 3 is identical With that of Fig. 1, except that the plate g is or may be omitted, and the base of the neck c enlarged and secured firmly to the door. In this arrangement, which may be preferred by some, the knob Eis immovably affixed to the door, as above stated. As the object of this invention is to prevent the latch from being actuated from the outside, it is desirable that the outer knob -be not readily removed so as to expose the spindle.

I make no claim to the interior mechanism ot' the latch g but I What I do claim as my invention is- The combinationo'f the spindle D, provided with a head, a., and 'an actuating-knob, c, with the inert knob E, provided with a recess or cavity to receive the head a, for securing the said inert knob to the spindle, the whole constructed to operate in connection with the latch of the door, substantially as described.

In witness whereof I have hereunto signed my name in the presence of two subscribing witnesses.

. HENRY A. DIERKES. Witnesses:

HENRY OoNNETT, ARTHUR C. FRASER. 

